Site Reliability Engineer

Site Reliability Engineer  
Hybrid – Attached to our Solihull, London or Hook office  
Full Time, Permanent - Participation in on-call rotation     
Band 4 / £65,000 - £75,000 (dependent on experience) 

Here at Serco, we’re looking for a Site Reliability Engineer to ensure the stability, availability, and performance of production systems and services across UK&E Digital Services. The role combines software engineering and systems operations to improve resilience, reduce operational overhead, and enable safe, scalable service delivery.

Working within an SRE model, you will apply reliability engineering principles, implement automation, manage incident response, and define SLIs/SLOs to ensure services remain dependable, observable, and performant in production environments.

As part of this you’ll:

• Build automation and tooling to eliminate manual operational tasks and improve service reliability
• Respond to production incidents, lead root cause analysis, and implement long-term fixes to prevent recurrence
• Design, implement, and maintain monitoring, observability, and alerting solutions across platforms and services
• Define and manage SLIs, SLOs, and error budgets to guide reliability and operational decision-making
• Analyse system performance and capacity trends, ensuring services remain scalable and resilient under load
• Support safe and reliable change management, including deployments, releases, and production transitions
• Drive continuous improvement in system reliability through automation, standardisation, and engineering best practice

What you’ll need to do the role:

• Strong programming and scripting skills (Python, Go, Java, or Ruby)
• Solid systems engineering experience across Linux/Unix environments and networking fundamentals
• Cloud platform experience (AWS, Azure, or GCP)
• Infrastructure as Code tools (Terraform, Ansible) and container platforms (Kubernetes)
• Observability and monitoring tools (Prometheus, Grafana, ELK, CloudWatch or equivalent)
• CI/CD pipelines and automated deployment tooling
• Background in Site Reliability Engineering, DevOps, or production operations
• Proven experience in incident management and on-call support in live production environments
• Strong track record of identifying operational inefficiencies and driving automation-led improvements
• Experience working in complex, distributed systems or enterprise-scale environments
• Strong analytical and problem-solving capability, particularly under pressure
• Clear communication skills, able to explain technical issues to non-technical stakeholders
• Ability to prioritise, adapt, and work effectively in fast-paced environments
• Proactive mindset with ability to anticipate risks and system failures
• Experience applying systems engineering principles and contributing to design decisions
• Strong collaboration skills, building effective relationships across technical and operational teams

What we offer:

• Flexible working considered
• Pension – 6%
• Chance to contribute to innovation in the public services
• A company passionate about diversity and inclusion
• Serco discounts which include cinema, merlin entertainment and online shopping discounts, and discounts on mobile phone plans and leisure centre memberships.
• A range of benefits to support the health and wellbeing of you and your family such as Employee Assistance Programme, Simply Health Cash Plans, and more.
• A wealth of career development training to suit your future aspirations. These range from role specific training, leadership coaching, formal study and much more to support you to build your career with Serco.
• A safe and supportive culture.

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About Serco
At Serco, not only is the nature of the work we do important, everyone has an important role to play, from caring for vulnerable people to managing complex public services.  We are a team of 50,000 people responsible for delivering essential public services around the world in areas including defence, transport, justice, immigration, healthcare and citizen services. We are innovators, committed to redesigning and improving public services for the benefit of everyone.

By joining Serco you will have unlimited access to our Global Employee Networks – SercoInspire (Gender), SercoEmbrace (Multicultural), SercoUnlimited (Disability) and In@Serco (LGBT & Networks). Serco Employee Networks, led by colleagues who are passionate about diversity, inclusion and belonging. 

Apply
Please click on the apply button to complete your application. Occasionally we receive a large volume of applications for our roles and when that happens we sometimes bring the closing date forward, so please apply promptly to avoid disappointment. 

At Serco, we see people first and foremost for their performance and potential. We are committed to building a diverse and inclusive organisation that supports the needs of all. As such we will make reasonable adjustments at interview through to employment for our candidates and strongly encourage applications from a diverse candidate pool. We are open to discussions around flexibility and flexible working. We operate a hybrid work structure in many of our business areas. We are proudly Disability Confident Leader employers and holder of the Gold Inclusive Employer Standard. Disabled applicants who meet the minimum criteria for the job will be given the opportunity to demonstrate their abilities at an interview.  For help with your application please contact 0345 010 4000.
 

At Serco we support fair access to employment for those with unspent criminal convictions through the ‘Ban the Box’ pledge (some may be exempt due to the nature of the role and the security clearance required). Please contact our recruitment team directly on 0345 010 4000 to discuss.